Hello there, I'm a newbie here, just run PI/PO on my Pioneer 106D on various media, can anybody give an explanation about what is PI/PO and which is the optimal values?

I'll post some picutures tomorrow.

so what's the exact meaning of PI total, PI peak? Which of the following media is better? It seems to me that the NEC drive produce more errors, maybe it is because of the higher(8x) speed compare to pioneer's 4x?